Liquid dispensing apparatus



Dec. 22, 1936. w. M. CARROLL LIQUID DISPENSING APPARATUS Fi1ed-Feb. 15, '1935 2 Sheets-Sheet 1 mlllllllll Dec. 22, 1936. w, mic 2,065,052

LIQUID DISPENSING APPARATUS Filed Feb. 16, 1935 2 Sheets-Sheet 2 IFuvanl'of; wdliwwflfarroll a @oam 7720m Patented Dec. 22,- 1936 UNITED STATES PATENT OFFIICE LIQUID DISPENSING APPARATUS Application February 16, 1935, Serial No. 6,780

32 Claims.

My invention relates to liquid dispensing de-' vices, and more particularly to gasoline dispensing installations.

One of the objects of my invention is to provide a, novel type of dispensing device for controlling the liquidflow through the dispensing line from a point remotely situated with respect to the pumping unit itself, and preferably from the nozzle end of the dispensing unit and in such a manner that liquid to be dispensed is utilized as a means for transmitting energy from the nozzle end upon the manual actuation of control means, to control the dispensing flow both in starting and stopping of the flow.

Yet another object of my invention resides in providing a liquid dispensing device including a dispensing line terminating in a dispensing conduit provided with a control nozzle, and particularly'wherein the terminal portions of the distrol nozzle, and wherein remote control mechanism for controlling both the starting and stopping of the dispensing flow is located at the nozzle, and wherein said control mechanism is adapted to start and stop the dispensing flow independent of any movement of the flexible hose, or independent of any encumbering devices extending longitudinally of the hose, such as Bowden wires, hydraulic tubes, air tubes, electrical connections and the like.

Yet another object of my invention resides in providing. a remote control mechanism for starting the ,fiow in the dispensing line of a dispensing mechanism wherein a column of liquid in at least a portion of the dispensing line is utilized as a means for transmitting pressure to an actuating means for controlling the dispensing flow.

Yet another object of my invention resides in providing a. remote control mechanism for a liq- 40 uid dispensing device having a flexible hose terminating in a nozzle wherein the column of liquid in the flexible hose is utilized for transmitting energy from a manually actuatable device disposed at the nozzle, to control mechanism for startingthe liquid flow and/or for stopping the liquid flow.

I Yet another object of my invention resides in providing control means at the nozzle end of a liquid dispensing device wherein a static column of liquid in the dispensing line is utilized as a medium of power transmission from the nozzle end of the line to a control device for governing the dispensing flow.

Yet another object of my invention resides in providing a-remote control mechanism for a liqpensing line comprises a flexible hose with a. conuid dispensing device wherein control means is provided at the nozzle end of the dispensing line, and wherein said control means is manually actuatable at desired times and utilizes; as an energy transmission means, a static column of liq- '5 uid in the dispensing line, and also utilizes a moving column of liquid in the dispensing line for controlling the dispensing operation.

Yet another object of my invention resides in providing a, liquid dispensing device wherein the 10 dispensing line terminates in a control nozzle and wherein manually operable remote control means is provided at the liquid dispensing nozzle and comprises a plurality of means, one of which, by its actuation, utilizes the stationary liquid 15 present after the dispensing operation has terminated, as a motion transmitter for actuating a control device to start the dispensing operation and wherein another one of said control means is utilized during the dispensing flow and utilizes go the moving column of liquid in the dispensing line as a motion transmitting means for actuating the control 'member to stop the dispensing flow;

Yet another object of my invention resides in 25 providing a liquid dispensing device with a control nozzle having 'a manually actuatable device including a plunger or other liquid forcing means adapted to displace more or less the column of liquid in the liquid dispensing line and by such 30 liquid displacement, to actuate a displaceable control mechanism at another portion of the line to start the liquid flow and/or to control/the dispensing operation.

Yet another object of my invention resides in '35 providing a dispensing device adapted to dispense exact and predetermined quantities of liquid, as for instance, one gallon, no more or no less, or one dollar's worth of liquid, no more or no less,

wherein the control mechanism is accomplished 40 from the nozzle end of the mechanism by the manually actuatable control means situated there, and wherein the dispensing liquid itself is utl-, llzed as a motion transmitter for starting and stopping the dispensing operation and in a. man- 45 her so that the exact amount or volume of liquid may be dispensed from a remote control point and after liquid dispensing has begun. Inshort, any exact amount or volume of liquid may be dispensed from the nozzle end, the selection be- 50 ing made at any desired time after the dispensing has beeninitiated.

Yet another object of my invention resides in providing a novel type of hydraulic control for a liquid dispensing device in the manner illus. 55

trated and described, in the attached specification and drawings.

These and other objects of my invention will be apparent from aperusal of the followingspecification when taken in connection with the following drawings, wherein Fig. 1 is an elevational view of one form of my dispensing mechanism;

Fig. 2 is a diagrammatic view of the dispensing line with the housing removed;

Fig. 3 is a vertical sectional view of the top portion of the pump showing the control and nozzle valves with the sylphon control mechanism' illustrated my invention as applied to a generally conventional type of pump, which includes a housing or pedestal 2 of any desired construction, shape or size, which housing or pedestal, as is well known in the art, comprises a housing for the supply pipe 4 adapted to be connected to a source of liquid to be dispensed, such as a gasoline or other liquid-containing reservoir. A conduit 4 connects to the inlet side of the pump 6 or other liquid-forcing means, which, in the present instance, is a rotary pump adapted to be driven by a motor 8 by power transmission'means l0. 7

The motor 8 is provided with any type of switch l2 adapted to be controlled by a rod l4. The discharge side of the pump may be connected to any type of air separator it which isadapted to discharge into a. dispensing pipe l8 forming a part of the dispensing line, which latter, in turn, discharges into the liquid measuring device preferably comprising any type of meter 20. I In addition, the pump is provided with the usual bypass line having a suitable spring-loaded valve, which valve is adapted to open upon the creation of a predetermined pressure in the line such as is created when the dispensing control valves in the line are closed, whereby the pump may continue to operate by by-passing the liquid through its valved by-pass line, as is well known in the art.

The meter 20 may be of any desired wellknown construction and is preferably of the liquid displacement type. I prefer to use any of the present commercial type of Bowser meters which are well known in the art. The bowl of the meter is shown in the dotted lines in Fig. 1. In general, it might be stated that this type of meter comprises a sequence of liquid displacement cylinders in which operate pistons. The liquid underlpressure, flowing into the meter, will operate the pistons in succession to rotate a shaft, which shaft, in turn, operates any type of clock mechanism to indicate at any instant, the amount of liquid dispensed.

As one type of means for controlling the flow of liquid passing through the dispensing line, I provide a control valve which in the present instance I preferably place in the conduit it, immediately at the outlet of the meter. This control valve comprises a coupling 22 connected to the discharge pipe for the meter 20, and providing an internal valve seat 24. In addition,

the coupling 22 is formed with an extension in the shape of a housing 26, the upper :portion of which is provided with a discharge coupling 28. A control valve 32 is constructed and arranged to seat against the valve seat'24, the construction being such that the discharge of the liquid from the meter into the housing 26 tends to seat the valve, whereby the iiow of liquid will Referring now to the drawings in detail, I have tend quickly and with a minimum of operating exertion, to seat the valve 32. Valve 32 is provided with a stem 34 which extends into a substantially circular conduit 36, formed by a partition 38. The stem 34 is provided at its upper end with a plunger 40 adapted when moved downwardly, to open the valve 32.

The stem 34 has at preferably its central portion, a grooved yoke 42 in which ride pins 44 mounted on a lever 46 pivoted to the shaft 48, which is mounted in the housing 26. 'Also fast to the shaft 48 is an arm '49 which carries at its outer end the rod l4 extending downwardly to actuate the motor switch l2. 'The outer end of lever 49, has connected thereto at one end, a spring 50, the opposite end of which spring is stationarily mounted in the housing 26. The spring 50 tends to close the valve 32. Means hereinafter referred to is provided for preventing the spring 50 closing the valve 32 except at predetermined, selected times'. Means hereinafter referred to is provided so that the pump will not be put into operation until the valve 32 has been opened, and since there will be no liquid pressure against the valve 32, when it is being opened, the power required to open said valve 32 is equal to the tension of the spring 50, whichwill not exceed a predetermined pressure, for example, 12 pounds, more or less.

Means is provided, in my invention, for controlling the dispensing operation, andin particular, means is provided for opening the control valve and/or also for starting the pump motor from the nozzle end of the dispensing outfit. Means is also provided, actuated and controlled from the nozzle end of the outfit-or pump, for causing the automatic closure of the control valve and/or motor pump under the constant will of the operator so that the operator may, during the flow of the liquid as in the dispensing operation, stop the flow and preferably in a manner whereby to dispense a predetermined, exact, volume of liquid measurable in preferably standard unit amounts or sub-multiples or multiples thereof, and wherein the dispensing will automatically stop after said exact unit measurement of liquid has been dispensed. For instance, if, during the dispensing operation, the purchaser should desire five gallons of liquid, the operator may, after starting the flow of the liquid, cause the dispensing of this exact amount and no more, bywhich arrangement, when a computer clock is utilized less. In other words, since the computer clock is arranged to cooperate with a dispensing mechanism hereinafter described, so as to stop the dispensing flow when a predetermined exact volume of liquid has been dispensed, corresponding to a piedetermined and exact price therefor at a basic price per gallon, the liquid to be dispensed can be dispensed accurately by either referring to the amount of liquid sold, or to the price of the liquid sold with the assured knowledge that the exact price and exact amount of liquid corresponding'to that price, will be correct."

In addition, means is pro ided so that should the purchaser change his order and desire an additional quantity of liquid, or an additional value of liquid, dispensing may immediately re- Sume by the operation of the control mean of the column of liquid in the dispensing line in connection with associated devices so that upon' the predetermined operation of manual means, the column of liquid in the dispensing line and preferably a predetermined portion thereof, will function not only to start the dispensing flow, but will also function to stop the dispensing flow and thereafter, if desired, recommence the dispensing flow. This remote control of the dispensing flow is accomplished without the addition of Bowden wires, air tubes, hydraulic liquid tubes, electric wires or other adiunctive devices extending along the usual flexible hose of the dispensing line. Experience has shown that such adjunctiv'e devices are, from a commercial and practical standpoint, mainly inoperative, or are barred by reason of Fire Underwriters regulations. For instance, it is well known that the flexible hose portion of the dispensing line tends to. stretch considerably after some usage, and hence where Bowden wire controls and/or sealed hydraulic tubes are utilized for the transmission of power .from the remote control station at the end of trical wires extending along the hose is barred due to the possibility of the switches sparking, and due to the possibility of the electric wires breaking as a result of continuous flexing, and

bending, during use. The compressed air remote control device, while overcoming the former objections, tends to make the dispensing, hose slightly bulky and unwieldy.

In carrying out my present invention, the cou-. pling 28 o1 the'housing 26 has attached thereto a rigid portion 52 of the dispensing line, which passes through the housing 2 and connects with the sight glass 54 mounted at the upper portion of the housing, as is well known. This sight glass 56 discharges through an outlet 56 to which is coupled one end of the usual flexible hose 58 as is well known in the art. The opposite end of this flexible hose 58 is provided with a nozzle 60,

which has. a discharge spout 62 and a nozzle guard 64. A'nozzle valve lever 66 is pivoted to the guard as at 68 and adapted to bear against the valve stem I0 of the nozzle valve I2, adapted to be normally seated by means of a spring I4 located within the nozzle 60. Inward movement of the valve I0 is adapted to open thevalve112.

In addition, the nozzle is provided with a check.

valve or drain valve I6, which is normally forcedupon its seat by means of a spring 18. This drain valve or check valve I6 is adapted to close as soon as the flow of gasoline ceases, so as to retain the gasoline within the flexible hose and irrespective of the closure of the nozzle valve I2.

The nozzle is also provided with a relatively small plunger 80, which is adapted to operate in a cylindrical portion 82 of the nozzle 60. This plunger is of cup-leather construction and is mounted on a rod 84 and held in position by two metal discs 86, and thenut 08. The rear end of the plunger assembly is provided with a valve-shaped disc 90 which, in normal position,

is held against the seat 92 by means of the spring 94 whereby to prevent leaking and whereby to enable the back stroke of the plunger to be relieved to atmosphere through a passageway 96, discharging into the nozzle spout 62. The stem is adapted to be pushed inwardly by means of a lever I00 pivotaily mounted as at I02 on the nozzle proper. To initiate the flow, the operator operates the lever I00 and releases it. This moves the plunger 00 inwardly and the column of liquid in the nozzle, and also in the flexible hose becomes a medium of tarnsmitting movement to the plunger 00 contained within the housing 26 located at the discharge outlet of the meter.

. Operating in conjunction with this housing 26 and particularly in connection with the partition 30 thereof, a valve I04 is provided. which is adapted to be seated by means of a spring I05 so as to close an opening in the partition 30, thereby confining the column of liquid between the plunger 40, that portion of the housing 26 formed by the partition 38, the valve 'I04. the

pipe 52, the flexible hose 58, the nozzle 60 including that portion thereof formed by the closed nozzle valve I2, and theplunger 80; It will thus be noted that due'to the arrangement of this check valve I04, and the fact that the nozzle valve is closed, I thus have a sealed column of liquid between this plunger 80 in the nozzle and the plunger 40 in the housing 26. When the plunger 80 moves inwardly, it moves the entire static column of liquid, thereby forcing the plunger 40 downwardly as shown in Fig. 3, and opening the valve 32. Due to the connections hereinbefore described, when the valve 32 is depressed, the arm 46 will be rocked, which will rock shaft 46, which in turn will move inwardly a locking finger or control member I06. W en this occurs, pawl I08 under actuation of spring IIO, which is fixed to a stationary part, and to an extension II2 of pawl I08. will lock the control flnger I00 in its outward position, thus locking the valve 32 in the open position. In addition, movement of the valve 32 downwardlywith the consequent rocking of shaft 48 will likewise rock lever arm 49, whereby to shift switch control rod I4 so that the motor switch will close the switch contact at the moment that pawl I08 drops into its locking position, which is preferably after the valve 32 has opened. A slight over-travel is provided for the control finger I06 to assure this condition.

In connection with the hereinbefore described remote control mechanism for the dispensing operation, I may, but not necessarily so, utilize the control mechanism with the type of exact and predetermined quantity or volume dispenser I have disclosed and claimed in applications heretofore filed by me, said applications known 4 l as Serial No. 4674, filed February 2, 1935, and

Serial No. 4,675, filed February 2, 1935, in which applications a more complete disclosure of the mechanism thereof is referred to, and particularly in application Serial No. 4,675 aforesaid.

As hereinbefore pointed out, the spring 50 tends to close the valve 32, but is prevented from so doing by the locking pawl I08.

In addition to the means for opening the valve 32 to start the dispensing flow, I have also provided means for stopping the fluid flow, and preferably from the remote control mechanism, in the present instance from the nozzle end of the dispensing unit. In this instance I preferably avail myself of a sudden rise of pressure in the dispensing line, and particularly the sudden rise of pressure occasioned by sudden stop- .page of the flow therethrough so that due to a water hammer action set up, the precipitate rise in pressure to a predetermined amount will operate a flexible bellows or sylphon arrangement whereby to actuate associated mechanism for controlling the liquid flow and particularly for closing or permitting the closure of the control valve 32 and/or the closing of the pump.

In the present arrangement, the housing 26 is provided with a displaceable devicesuch as a cylinder piston but preferably a flexible diaphragmmatic device preferably in the form of a sylphon or bellows II4, the outer end of which carries a stem 6, normally expandedby means of an internally located spring II8. This stem extends outwardly through the wall of the housing 26 directly into the path of the extension II2 on the pawl I08. The spring II 8 is peripherally provided with an adjustment consisting of the bushing threadedly engaging the sylphon housing about the plunger H6 and contacting spring II8. By the arrangement of this displacement device, such for instance as a sylphon bellows, after the dispensing operation has begun, I am enabled to operate the control mechanism for stopping the dispensing flow, by utilization of the moving body of liquid flowing through the flow line, and-particularly through the terminal or terminal portion thereof. Specifically, I utilize the momentum of the flow of the gasoline and take advantage of the so-called hammer action for transmitting motion to the actuatable mechanism. In short, by the quick closing and then opening movement of the lever 60 which closes momentarily and then opens the nozzle valve 12, a hammer action is created in the terminal portion of the flow line, which acts upon the collapsible or displaceable member, to-wit: specifically the slyphon bellows III, whereby to actuate the plunger III; which will strike the'locking pawl I08, pushing it outwardly, thereby releasing the locking control member I06 which 'will permit the valve 32 to close under the action of the flow of the liquid and the spring 50; After the momentary closing of the nozzle valve 12 to actuate and close the control valve 32 has been accomplished, the dispensing flow will terminate and therefor it is immaterial r if the nozzle valve is opened or closed, since the It will be noted that during the dispensing operation the liquid 'will flow through the meter, flow through the opened control valve 32 and will open the check valve I04 against the tension of its spring, the liquid flowing thence through the flow line. During this flow the liquid will not pass the plunger I0,'but will flow through the open check valve I04. n the other hand, when it is desired to start the flow and the lever I00 is operated, and as a consequence plunger 80 is forced inwardly, the column of liquid being confined by the nozzle valve I2 and by the then closed check valve I04, the liquid will forcethe plunger 40 downwardly to open the control valve 32. The pressure created by forcing the plunger: 80 inwardly is arranged to produce a pressure in the housing 26 of substantially twelve pounds, which is suiiicient to open the valve 32 against the tension of the spring 50, since this latter spring is selected as not to have its pressure exceed 12 pounds. The sylphon bellows H4, being adapted to be operated by hammer action pressure, which is somewhat in excess of the customary pre-selected 15 pounds by-pass pressure of the pump by-pass check valve, the sylphonspring II8 will have its pressure adjusted so thatthe sylphon will operate at an excess of the l5'pounds by-pass pressure, and consequently willnotbe actuated by the pressure created upon operationv of the lever I00. In short, the pressure of the spring H8 or the pressure at which the collapsible device, such as the sylphon bellows, operates,

is appreciably higher than the pressure of the spring controlling the valve in the pump by-wpass line and is appreciably higher than the pressure created by operating-the starting plunger.'I00. Therefore, when it is desired to startdispensing, the opening of the control valve, as hereinbefore described, will likewise swing the control-pawl I 06' to the left, or in a counterclockwise direction,

which will be sufi'icient to move this control pawl I06 under the shoulder of the locking pawl I08, which is moved downwardly by means of the spring IIO, thereby holding the control valve 32 in an open position, and likewise subsequently moving the pump motor switch to a position such as to start the pump. In this connection it will be noted that since the valve 32 is opened prior to the starting of the pump, the opening movement occasioned by the inward movement of the plunger 80 will be sufficient to overcome the spring 50. The control valve, having been opened, it is then held in open position by means of the latch I08. When it is desired to stop dispensing, momentary closing of the nozzle valve, as herein before described, will create a pressure in excess of the pressure of the spring II8 which will thence operate the sylphon to project plunger II 6 thereof to the right, whereby to release the latch I08, and since the pump is still operating and creating a flow through the open control valve 32, this .valve will close under the pressure of the dispensing flow and also under-the pressure of the spring 50.

If desired, instead of closing the control valve at any desired instant, irrespective of the dis pensing of an exact or predetermined amount or volume of liquid, I may arrange the control pawl I 06 whereby it cooperates with an associated control device, such as disclosed and claimed in my prior applications, Serial No. 4,674 and Serial No. 4,675, and particularly Serial No. 4,675, hereinbefore referred to, in which case the meter is provided with an extension shaft I20 carrying a rotatably driven slotted disc I22 which corresponds to. the slotted disc shown in my prior applications, hereinbefore mentioned. In addition, the computing mechanism and associated cooperative mechanism ofthese two applications may be 7 utilized in connection with this slotted disc, it being understood, of course, that the remote control devices of said applications are not utilized, but in place thereof, the present disclosed invention is utilized. The slotted disc is utilized in association with the control pawl I06, the valve will close only when a slot in the disc registers with this control pawl I06 so that as the meter shaft rotates, a slot thereof will be brought into registration with the control I06 at a time when an exact, predetermined amount or volume of liquid has been dispensed, and at that time, and no other, the control I06 will be operated to permit and-bring about the closing of the control valve 32. In other words, the mechanism will'function exactly as the mechanisms in my prior, applications Serial No. 4,674 and Serial No. 4,675

function.

It is to be understood, of course, that when the control mechanism is used without the slotted disc construction for delivering predetermined gallonages, as hereinbefore stated, the nozzle valve control lever is operated in amanner quickly to close the nozzle valve to produce the water hammer action. When once closed, obviously the valve can remain closed because the control valve and/or the pump will be practically instantly stopped, however, when the remote control mechanism is utilized with-the. slotted disc construction hereinbefore set forth, the nozzle valve will be closed momentarily to initiate the subsequent automatic closure of the control valve by the slotted disc mechanism and that after the momentarysclosureof the nozzle valve, the same will then remain open to continue the dispensing until the control valve is automatically closed at a predetermined gallonage.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a liquid dispensing device, the combination with means -forming a dispensing line through which liquid is adapted to flow under pressure, a dispensing nozzle on said line and a shiftable control member for said dispensing nozzle, shiftable means for controlling the dispensing flow, and manually operable means actuated from the nozzle end of said line for actuating said shiftable means for starting the dis- .pensing flow, said manually operable means including devices utilizing the liquid in at least a portion of said dispensing. line.

2. In a liquid dispensing device, the combination with means forming a dispensing line through which liquid is adapted to flow under pressure, said line terminating in a dispensing nozzle, shiitable means for controlling the dispensing flow, and manually operable means actuated from the nozzle end of said line for shifting said'means for starting and stopping the dispensing flow, said manually operable means including devices utilizing'the liquid in at least a portion of said dispensing line.

for actuating the dispensing control means due to the manual actuation of said shiitable means at the nozzle, said motion transmitting means including means for creating relatively difl'erent pressures by the utilization of a portion of th liquid column in said dispensing line. 1

4. In a liquid dispensing device, the combination of means forming a dispensing line through which liquid is adapted to be dispensed under pressure, control means for starting and stopping the flow through said line, manually actuatable means remotely situated from said control means and located at the nozzle end of said line including means utilizing the movement or the liquid in the flow line for creating a water hammer and actuated thereby for actuating said control means to stop the fiow and including means for utilizing the static column of liquid in such flow fine for operating the control means to start the ow. 5. In a liquid dispensing device the combinetion of means forming a dispensing line through which liquid is adapted to be dispensed under pressure, a dispensing nozzle for said line, a manually shiftable valve for said nozzle dispensing control means for starting and stopping the liquid flow, manually actuatable means disposed at the dispensing nozzle and remote from said control means, and means operated by said manually actuatable means for transmitting pressure through the instrumentality of at least a portion of the liquid flow line for operating-the dispensing control means to start and also to stop the liquid flow.

6. In a liquid dispensing device, the combina-' '7. In a liquid dispensing device the combina tion of means forming a dispensing line through which liquidis adapted to be dispensed under pressure, a shiftable control valve for said line for controlling the dispensing therethrough, dispensing control means for starting and stopping the liquid flow, manually actuatable means disposed at the dispensingnozzle and remote from said control means, and means operated by said manually actuatable means-for creating a pressure through the instrumentality of at least a portion voi. the liquid flow line for starting the dispensing control and for creating a diflerent pressure through instrmnentality of at least a portion or the liquid flowline ior stopping the liquid flow.

8. In a liquid dispensing device, the combination of means forming a dispensing line through which liquid is adapted to be dispensed under pressure, an actuatable control valve for said line,

dispensing control means for starting and stopping the liquid flow, manually actuatable means disposed at the dispensing nozzle and remote from said control means, and shittable means operated by said manually actuatable means for momentarily stopping the dispensing flow to create a water hammer, and means operable by said water hammer for operating said dispensing control means and shiftable means operable by said manually actuatable means upon the termination of the dispensing flow for bodily moving at least a portion of the dispensing column insaid flow line for actuating said control means to start the liquid flow.

9. In a liquid, dispensing device, the combination of means forming a dispensing line through which liquid isadapted to be dispensed under pressure, a pump for forcing liquid through said line, a motor for operating said pump, a switch for operating the motor, said line terminating in a dispensing nozzle, manually actuatable control means located at the nozzle and remote from the pump, and pressure-operated devices'operable by pressure created upon the manual actuation of said control means and through the instrumentality of liquid in the flow line for causing the starting and stopping of said pump.

10. In a liquid dispensing device, the combination of means forming a dispensing line through which liquid is adapted to be dispensed under pressure, a control valve for said line adapted to open and close to control the dispensing flow therethrough, said line, terminating in a dispensing nozzle, manually actuatable control means located at the nozzle and remote from the valve, and pressure operated devices operable by energy created upon the manual action of said control means located at said nozzle and through the instrumentality of liquid in the flow line for causing the opening and closing of said valve.

11. In a liquid dispensing device, the combination of means forming a dispensing line terminating in a nozzle, a pump for forcing liquid through said line, a valve adapted to control the flow through said line and closing on its seat in a direction with the flow of liquid through said line, spring means for aiding the closure of said valve, control means for said pump, manually actuatable means disposed on said nozzle and pressure operated devices operable by pressure created upon the manual actuation of said actuatable means and through the instrumentality of liquid in the flow line for causing the opening of saidvalve and thereafter for causing the operation of the pump.

12. In a liquid dispensing device, the combination of means forming a' dispensing line terminating in a nozzle, a pump for'forcing strumentality of liquid in the flow line for causing the opening of said valve and thereafter for causing the operation of the pump and for thereafter causing said pump to stop after said control valve has closed.

13. In a liquid dispensing device, the combination of means forming a liquid flow line through which liquid is adapted to be forced under pressure, an actuatable control valve for said line, said line terminating in a nozzle, means for controlling the liquid flow in said line, manually actuatable means for utilizing a portion of the column of liquid trapped in the line during the standby conditions for operating said control means, and manually operable means for utilizing at least a portion of the colunm of liquid travelling the same line during dispensing for actuating said control means.

14. In a liquid dispensing device, the combination of means forming a dispensing conduit through which liquid is adapted to be forced under pressure, manually operable means for stopping the liquid flow in said line whereby to entrap a column of liquid in said line, means utilizing the momentum of said column in order to stop the liquid flow, and shiftable means operable upon the entrapped column of liquid to initiate liquid flow in said line.

15. In a liquid dispensing device, the combination of means forming a liquid conduit through which liquid is adapted to be forced under pressure, an actuatable control valve for said line, manually operable means for stopping the liquid flow in said conduit and for utilizing the momentum of said checked column of liquid ing to entrap a column of liquid in said lineafterflow has ceased, and manually operable means for utilizing said ent apped liquid to control said power operated means.

17. In a liquid dispensing device, the combination of means forming a dispensing line, a pump for forcing liquid through said line, said line terminating in a nozzle valve having a manually operable member, a drain valve disposed be-, tween said nozzle valve and the end of said nozzle, said nozzle including a'spring operated plunger adapted upon movement to bodily move thecolumn of liquid in said nozzle and in said line when said nozzle valve is closed, said dispensing line at a remote point including a control valve, a plunger for operating said control valve, said plunger being operable by the movement of a column of liquid in said line, a Spring-operated check valve controlling the by-pass conduit connecting the valve seat of said valve with said conduit around said plunger, spring means for closing said control valve, a presure-operated device disposed in the conduit on the nozzle side thereof of said second plunger, said device operating at a higher pressure than the spring of said control valve, a control pawl for said control valve, and a locking latch for holding said pawl and the control valve in an open position, said latch being operable by movement of said collapsible device.

18. In a liquid dispensing device, the combination of means forming a dispensing line, a pump for forcing liquid through said line, said line terminating in a nozzle valve having a manually operable member, a drain valve disposed between said nozzle valve and the end of said nozzle, said nozzle including a spring operated pllmger adapted upon movement to bodily move the, column of liquid in said nozzle and in said line when said nozzle valve is closed, said dispensing line at a remote point including a control valve, a plunger for operating said control valve, said plunger being operable by the movement of a column of liquid in said line, a spring-operated check valve controlling the by-pass conduit connecting the valve seat ofsaid valve with said conduit around said plunger, spring means for closing said con- 75 latch for holding said pawl and the control valve in an open position, said latch being operable by movement of said collapsible device, and a pump controlling member and means for operating said pump controlling member from the operation of said control valve, said pump controlling member operating to start the pump after the opening of said control valve and for stopping the pump after the closing of said control valve.

19. In a liquid dispensing device, the combination with a pump, a meter, means forming a liquid flow line through which liquid is adapted to be forced for operating said meter, a meter shaft carryinga rotatable control disc having a plurality of control members thereon, a cooperative control member adapted to be actuated upon registration with any of said control members for bodily shifting a portion of the dispensing column, and means actuated thereby for shiiting the control valve to open the same.

20. In a liquid dispensing device, the combinationlof means forming a dispensing line through which liquid is adapted to flow under pressure, said line terminating in a dispensing nozzle, means for controlling the dispensing flow, manually operable means at the nozzle end oi said -line, including a plunger adapted on operation to bodily move the column of liquid in said nozzle and line, and pressure actuated means moved by said column of liquid for actuating the flow controlling means.

21. In a liquid dispensing device, the combination with means forming a dispensing line through which liquid is adapted" to flowunder pressure, an actuatable control valve for said line, means for controlling the dispensing flow, and manually operable means disposed at the end of the dispensing line remote from the flow controlling means, said manually operable means including devices for creating a pressure upon at least a portion of the column of liquid in said line and means actuatable by the movement or said column of liquid to start said flow control means.

22, In a liquid dispensing device, the combination ofmeans forming a liquid flow line through which liquid is adapted to be forced under pressure, an actuatable control valve for said line, shiftable means for starting the flow through said line, manually operable means located at the end oi said flow line remote from said shiitable means and devices connected thereto adapt ed upon actuation of said shiftable means to bodily move at least a portion of the column of liquid in said how line and thereby actuate the shiitable fiow control means for starting the liquid flow.

23. In a-liq'uid dispensing device the combination otmeans' forming a liquid flow line terminating in a nozzle, a control valve disposed adjacent the end of the dispensing line, an actuatable means for opening and closing said valve, means for forcing liquid under pressure through said dispensing line, a meter in said line adapted to measure the flow therethrough, means for controlling the flow of liquid through said line, shiftable means adapted to confine a body of the liquid normally flowing through said line, a shiftable device associated with that portion of the line in which the'liquid is so entrapped and adapted to be actuated by a water hammer efiect produced in the line, means actuated by the 'shiftable means for operating the fluid control means, a second shiftable means disposed in that portion of the line in which the liquid is entrapped and operatively associated with the liquid control means, and shiftable means associated with the line for manually moving the body of liquid so entrapped to actuate said last mentioned means.

24. In a liquid dispensing device the combination of means forming a liquid flow line, means for forcing liquid through said line under pressure, liquid measuring means in said line, said line terminating in a dispensing nozzle, manually actuatable control means for stopping the flow in said line, control means for said line to start and stop the flow, means for entrapping a column of liquid in said flow line, shiftable means disposed in that part of the new line in which the tion of means forming a flow line through which liquid is adapted to flow under pressure, liquid measuring means in said flow line, said flow line terminating in a dispensing nozzle, valve means located adjacent the end of said line for controlling the flow therethrough, operable means thereat for operating said valve, a shiftable device operatively associated with said flow line and adapted to be shifted in response to the flow of .liquid therethrough, control means for controlling the flow-of liquid through said line and actuated by the shifting of said device, a by-pass-line in said dispensing line around said shiftable device to permit the-free flow of liquid through the line during the dispensing operation, closure means adapted to close said by-pass after said dispensing operation has ceased, and means for creating a predetermined pressure upon said closure means through the column of liquid in said line for closing the same, said pressure creating means being sufiicient to also. shift said shiftable device in the line to actuate said control means.

26. In a liquid dispensing device, a dispensing conduit having means at one end thereof for supplying liquid under pressure thereto, a valve located intermediate the ends of said conduit, means operated in synchronism with said valve to control said first named means to supply or to stop supplying fiuid to said conduit according to whether said valve is open or shut, means operable in response to a predetermined pressure in the other end of said conduit for opening said valve and maintaining it open, and additional means responsive to a different predetermined pressure in said other end of the conduit for releasing said maintaining means to permit closing ing orclosing of said valve, means operable upon the control of said shiftable means for deliveringthe creation of a predetermined pressure in the other end of said conduit to open said valve and maintain it open, means to prevent the complete closing of said valve except when an exact unit quantity of fluid or multiple thereof has been dispensed through said conduit and additional means responsive to a different predetermined pressure in said other end of the conduit for disabling the maintaining means to condition said valve for closing under control of said prevent- :Zng means.

28. In a liquid dispensing device, the combination with means forming a dispensing line through which liquid is adapted to flow, shiftable means in said line for controlling said flow, manually operable means in said line at a point remote from said shiftable means and adapted to utilize the liquid in the line between the manually operable and said shiftable means for actuating the shiftable means in response to manipulation of the operable means.

29. In a liquid dispensing device, the combination with means forming a dispensing line through which liquid is adapted to flow, shiftable means in said line for controlling said flow, man ually operable means in said line at a point remote from said shiftable means and adapted to utilize the liquid in the line between the manually operable and said shiftable means for actuating the shiftable means in response to manipulation of the operable means, and means under 'iquid under pressure to said line.

30. In a liquid dispensing device, the combina tion with means forming a dispensing line through which liquid is adapted to fiow, shiftable means in said line for controlling said flow, manually operable means in said line at a point remote from said shiftable means and adapted to utilize the liquid in the line between the manually operable and said shiftable means for actuating the shiftable means in response to manipulation of the operable means, and means for measuring the liquid flowing in said line.

31. In a liquid dispensing device, the combination with means forming a dispensing line through which liquid is adapted to flow, shiftable means in said line for controlling said flow, manually operablemeans in said line at a point remote from said shiftable means and adapted to utilize the liquid in the line between the manually operable and said shiftable means for actu-' ating the shiftable means in response to manipulation of the operable means, means under the control of said shiftable means for delivering liquid under pressure to said line, and means operable upon initiation of flow in said line to prevent discontinuation of flow until a predetermined quantity of liquid has passed through the line.

32. In a liquid dispensing device, the combination with means forming a dispensing line through which liquid is adapted to flow, shiftable means in said line for controlling said flow, manually operable means in said line at a point remote from said shiftable means and adapted to utilize the liquid in the line between the manually operable and said shiftable means foractuating the shiftable means in response to manipulation of the operable means, m'eans under the control of said shiftable means for delivering liquid under pressure to said line, displacement measuring means operatively associated with said line for measuring the liquid flowing therein, and means drivingly connected with said measuring means and operable to prevent discontinuation of flow until a predetermined quantity of liquid has passed through the line.

WILLIAM M. CARROLL. 

